MPX5700 Series Piezoresistive Transducers NXP Semiconductor MPX5700 Series Piezoresistive Transducers are monolithic silicon pressure sensors designed for applications employing a microcontroller or microprocessor with A/D inputs. The MPX5700 Transducers combine advanced micromachining techniques, thin-film metallization, and bipolar processing to provide an accurate, high level analog output signal that is proportional to the applied pressure.